Detailed screenshots of what appears to be a new Apple software application called Healthbook were published Monday by 9to5 Mac, a website dedicated to Apple news. The screenshots indicate Apple is working on a single iPhone destination to track and monitor health and fitness information.

There are already a raft of fitness trackers available from companies like Nike, Fitbit and Jawbone. Samsung recently announced its own wearable device called Gear Fit.

The Healthbook images look like Apple’s existing Passbook app, where iPhone users can store everything from loyalty cards to boarding passes. Each virtual card in Healthbook offers information about a specific fitness and health category, such as the user’s heart rate, hydration levels, oxygen saturation and blood sugar.

Other categories appear to include sleep tracking, weight, nutrition and blood work. There is also has an emergency card that appears to be a single destination for information such as blood type, weight, and whether the person is a blood donor.